Screw-adjusting device.



I. B. WEISMILLER.

SCREW ADIUSTING DEVICE.

APPLICATION FILED NOV. I8 |915.

Patented June 6, '1916.v

lto

srafins ra'imvi onirica.

J' OHN B. WEISMILLER, OE NEW YORK, N. Y., ASSIGNOR 0F ONE-THIRD TOCHARLES H.

HESSION, OF BROOKLYN, NEW YORK, AND ONE-THIRD T0 BODGE, OF

N'UTLEY, NEW JERSEY.

SICREW-ADJUSTING DEVICE.

. VSpecification of Letters Patent.

Application led November 18, 1915. Serial No. 62,203.

To all whom it may concern:

Be it known that I, JOHN B. WEI'SMILLER, citizen of the United States,and resident of New York, in the county of Bronx and State of New York,have invented certain new and useful Improvements in Screw-AdjustingDevices, of whichl the following isa specification.

The invention relates to improvements in screw-adjusting devicesdesigned particularly for regulating the spaced relation of theworkingparts of machinery, and holding the same against accidentaldisplacement 1ncident to the vibration of the moving inembers;` and theobject of the invention is to provide a simple device that may beadjustably operated to the finest extent and in which thelocking tensionupon the screw may be readily increased or diminished` to conform withthe conditions of various situations.

In describing the invention in detail reference is had to theaccompaniying drawings, forming a part of this speci cation, and inwhich: A

Figure 1 represents a slde view of a common application of the presentinvention,

arts thereof being shown in section; and gig. 2 shows a modification ofone of the members thereof.

As herein shown, numeral 1 designates an ordinary frame, in which ismounted the relatively slidable journal-box 2, carrying anoperatingroller 3, arranged for adjustment with respect to an opposingroller 4, journaled in a fixed bearing. A. spring 6 engages one side ofthe box 2 and normally tends to outwardly-urge the same for theseparation ofthe rollers. A set-screw 7 is screw-threaded in the frame1, with its inner end engaging the adjustable box in opposition tothespring 6. Exterior of the frame the set-screw is arranged in threadedengagement with the thrust-plate .8, and encircling the screw is aspring 9, the opposite ends of ywhich bear against the frame andthrust-plate, exerting an opposing thrust therebetween and tending toclamp and hold the screw -by friction against accidental turningmovement. Loosely extending through the thrust-plate is a stop-screw 10,the inner end of which is detachably -connected to the' frame by ascrew-thread formed thereon.

0n the removal of the stop-screw 10, the thrust-plate 8 may be rotatedupon the setscrew in .opposite directions for the compression orexpansion of the spring 9 4to change the tension thereof to suit thevarying conditions of different locations of use. The stop-screw' 10 isthen replaced and the set-screw may then be operated without va. ryingthe spaced relation between the frame and thrust-plate. By turningtheset-screw it will be obvious that an adjustment will be effected betweenthe frame 1 and the box 2, with a corresponding adjustment between theoperating rollers 3 and 4.-

In the common form of adjusting means consisting of an ordinaryset-screw and locknut, difficulty is frequently experienced in makingfine adjustments by the tendency ofl the nut, while being locked, toaccidentally turn the set-screw and disturb the effected adjustment.Also, when the nut is loosened for making a new adjustment, gaged by anexisting position,j an accidental turning movement of the set-screwagain occurs, tending to make the new adjustment uncertain. The present'invention overcomes these objectional features by maintaining aconstant spring tension upon the set-screw and allowing it to beforciblyturned in eitherl direction to anyv extent without loosening theassociated parts.

While I have shown the adjusting device as applied to the spacing ofrollers, it will be evident that the same may likewise be applied to avarietyof adjustable mechanical parts wherein the relativelymovableinembers correspond with the frame 1 and box 2.

In the modification shown in Fig. 2, the inner end ofthe set-screw isprovided with a groove 11, which engages a socket 12 formed in the boxfor effecting the relative movement of the latter in opposite direc.-tions, obviating the use of the above-mentioned spring 6, shown in Fig.1.

What I claim as my invention and desire to secure by'Letters Patent, is:

1. In an adjusting device, a relatively xed member, a member supportedadjacent thereto for relative movement in opposite directions, aset-screw threaded in one of said members and controlling the movementsof said movable member, a thrust-plate in threaded engagement with saidset-screw, a

ioe

between said thrust-plate and the threaded member, and means for holdingsaid thrustplate against rotation.

2.1'n an adjusting device, a relatively fixed member, a member supportedadjacent thereto for relative movement in opposite directions, aset-screw threaded in one of said members and controlling the movementsof said movable member, a thrust-plate in threaded engagement with saidset-screw, a spring disposed to exert an opposing thrust between saidthrust-plate and the threaded member, means for adjusting the thrust ofsaid spring, and means for holding said thrust-plate against rotation.

In an adjusting device, a relatively fixed member, a member supportedadjacent thereto for relative movement in opposite directions, aset-screw threaded in one of said members and controlling the'lmovements of said movable member, a thrustplate in threaded engagementWith said setscrew, a spring encircling said set-Screw and exerting anopposing thrust between said msm-ae thrust-plate and threaded member,and a stop loosely engaging said thrust-plate and detachably secured tosaid threaded member.

4. In an adjusting device, a set-screw, a thrust-plate in threadedengagement with said set-screw, means for exerting an adjustablefrctional resistance to the movement of said set-screw in saidthrust-plate, and means for holding said thrust-plate against rotation.

5. In an adjusting device, a set-screw, a thrust-plate in threadedengagement therewith, a spring encircling saidy screw and `exerting atension on said lthrust-plate for resisting the rotative action 'of saidsetscrew, and means for holding said thrustplate against rotation.

Signed at New York in the county of New York and State of New York this16th day of November A. D.-19]r5.` l JOHN B. WEISMILLER. Witnesses:

JOHN A. EADES, CHAs. LA RUE.

